Author Topic: Verification that a 3.5 bar FPR wont run right on the M42? (Read 2480 times)

JoeDellio · « **on:** July 01, 2009, 03:52:48 PM »

I got sent the wrong one, but I threw it in just to test things. I cant smell any fuel or anything, but since its suppose to have a 3.0 bar FPR am I inviting trouble?

Stupid question?

1991 E30 M42 · « **Reply #1 on:** July 02, 2009, 02:35:03 AM »

it will work just fine once the ecu adapts

JoeDellio · « **Reply #2 on:** July 02, 2009, 03:43:06 AM »

cool, thanks. I was thinking it would just fire the injectors normal, but with a higher pressure they would dump more fuel.

Deftones · « **Reply #3 on:** July 02, 2009, 01:41:38 PM »

if you disconnect the O2 sensor it will do so

JoeDellio · « **Reply #4 on:** July 02, 2009, 06:01:15 PM »

Quote from: Deftones;74709

if you disconnect the O2 sensor it will do so

What do u mean? If I disconnect the O2 it will adjust to it? Im not sure what you meant. Can you please clarify that for me?

B318M42W · « **Reply #5 on:** July 02, 2009, 10:59:54 PM »

the O2 sensor will tell the ECU to rich/lean the mixture. so if you disconnect the O2 sensor, the ECU won't be able to adapt to it and you will send fuel into your exaust...

JoeDellio · « **Reply #6 on:** July 03, 2009, 02:07:23 AM »

Quote from: B318M42W;74736

the O2 sensor will tell the ECU to rich/lean the mixture. so if you disconnect the O2 sensor, the ECU won't be able to adapt to it and you will send fuel into your exaust...

ah, ok, I didnt know that he meant that.

I should maybe try looking into O2 sensor electrically.

What ways could I test the sensor and the harness themselves? My car is running pig rich as if it was dead or unplugged.